<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*div{*/
            /*width: 100px;*/
            /*height: 100px;*/
            /*!*border-color: tomato green gray yellow;*!*/
            /*!*border-width: 1px 3px 5px 7px;*!*/
            /*!*border-style: solid dotted dashed double;*!*/
            /*!*一个值:上下左右*/
            /*四个值:遵循顺时针上右下左*/
            /*三个值:上 右左 下*/
            /*两个值:遵循上下 左右*/
            /**!*/
            /*!*border-top-style:solid ;*!*/
            /*!*border-left-style:solid ;*!*/
            /*!*border-top-color:red;*!*/
            /*border:yellow solid  10px;*/
        /*}*/
        /*a{*/
            /*!*display: block;*!*/
            /*display:inline-block;*/
            /*color:white;*/
            /*height: 30px;*/
            /*background-color: gray;*/
            /*text-decoration: none;*/
            /*line-height: 30px;*/
            /*text-align: center;*/
        /*}*/
        div{
            width: 100px;
            height: 100px;
            border: solid 2px red;
        }
        div.brother{
            display: none;
        }
    </style>
</head>
<body>
    <div class="brother"></div>
    <div></div>
    <a href="">手机</a>
    <a href="">小米商城</a>
</body>
</html>























